2. We can't go into the science laboratory because another class is using it at the moment.

Present Continuous

3. I'm fed up because they have cancelled our trip to the museum.

Present Perfect.

4. Robots will do more jobs as this century advances.

Future Simple

5. When we tried to get into the museum yesterday, we found they were reorganising it.

Past Continuous

6. Someone has removed the website I was looking for!

Present Perfect

7. They will send a new spacecraft to Mars next month.

Future Simple

8. When did someone invent the first car?

Past Simple

9. They don't let visitors take drinks into the hall.

Present Simple

10. They made us leave the museum because one of out group misbehaved.

Past Simple

11. My uncle nearly became an astronaut, but they turned him down at the last minute.

Past Simple